Meanings
- alternativeAlternative form of proto-Earth
The protoatmosphere of the earth is understood as that gaseous envelope which surrounded our planet during its developmental stage as a protoplanet, or protoearth.
1953, H Strughold, “Comparative ecological study of the chemistry of the planetary atmospheres”, in The Journal of Aviation Medicine, asma.kglmeridian.com2 more examples
100,000 years up to 1myr: protoearth embryo grows from size of Moon to size of Mars, radioactive minerals and heating from impacts create magma oceans on protoearth
2009, Dale A. Russell, Islands in the Cosmos: The Evolution of Life on Land, page 36This material is strongly dissipative and will spread out and tidally interact with the protoearth in such a way that much of it collects to form the Moon beyond the Roche lobe of the Earth.
2019, Warren D. Cummings, Evolving Theories on the Origin of the Moon, page 153
Origin
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Cite this entry
protoearth. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/protoearth
“protoearth.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/protoearth. Accessed November 4, 2026.
WatkinsX Dictionary, s.v. “protoearth,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/protoearth.
Source: protoearth on Wiktionary, CC BY-SA 4.0.